I don't like the heels on them... way too chunky! I like to use the heel of the runner and find the heel area on stock steel way better... I felt all over the place on them until I had noicing sports do a combo radius on them with a neutral pitch, which I love! I did have the heel shaved down on them,which did make it a bit better, but when I eventually send them to have them profiled again, I'm going to have the heel shaved down even more. The extra height of the steel with the extra height of the +4.0 holder is a little much, but used to it now, but still think the height of the steel could of been a little less for the CCM holder. But the quality of the steel is great and sticking with it from now on.